register

The procedure is a taking a of Status as parameter.
Procedures are asynchronous, and must complete or fail the given .
If the future object is failed, the procedure outcome is considered as `DOWN`. If the future is
completed without any object, the procedure outcome is considered as `UP`. If the future is completed
with a (not-null) Status, the procedure outcome is the received status.

register

The procedure is a taking a of Status as parameter.
Procedures are asynchronous, and must complete or fail the given .
If the future object is failed, the procedure outcome is considered as `DOWN`. If the future is
completed without any object, the procedure outcome is considered as `UP`. If the future is completed
with a (not-null) Status, the procedure outcome is the received status.